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Finding the Fourth Proportional to 710,400.76, 980,633.60 and 438,578.56

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Solution

The fourth proportional to 710,400.76, 980,633.60 and 438,578.56 is: 605,411.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,400.76 : 980,633.60 = 438,578.56 : x
  2. Step 2: Convert to fraction form
    710,400.76/980,633.60 = 438,578.56/x
  3. Step 3: Cross multiply
    710,400.76x = 980,633.60 × 438,578.56
  4. Step 4: Simplify right side
    710,400.76x = 430,084,872,175.62
  5. Step 5: Solve for x
    x = 430,084,872,175.62/710,400.76
  6. Step 6: Final answer
    x = 605,411.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.